Product Review

YES, this converter will work with most pilot fountain pens including pilot
parallel and decimo. The only thing that I don't like, since the front body part
of parallel is semi-transparent, the ink will stuck in there after you dip the
nib into ink. It's kind of annoyed me. The BEST solution and probably cheaper
solution is Private Reserve Cartridge filling units (24CAR). You can refill any
ink cartridge with any bottled ink. For parallel, you still have that small ball
inside the cartridge to stir the ink and it hold much more ink than this
converter too.
For other pilot fountain pens, this converter works wonder.